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@github-actions github-actions released this 14 Mar 13:35
· 15 commits to main since this release
v0.0.2
0054356

Bug Fix: Reconciliation Feedback Loop

This release fixes a critical bug where the BGP and pool sync controllers entered a tight reconciliation loop (~4 events/second), causing unnecessary CPU usage and event spam in etcd.

Problem

Three interacting issues created an infinite reconciliation cycle:

  1. BGPSyncReconciler unconditionally updated CiliumBGPAdvertisement resources on every reconcile, even when the spec was unchanged
  2. PoolSyncReconciler watched DynamicPrefix without predicate filters, so status-only updates triggered pool reconciliation
  3. Pool updates always wrote a new last-sync timestamp annotation, which triggered BGPSyncReconciler's pool watch, restarting the cycle

Impact

  • ~176m CPU consumed continuously by the operator for no useful work
  • Thousands of unnecessary Kubernetes events flooding etcd
  • Increased apiserver memory pressure from watch event processing

Fix

  • Skip no-op updates to CiliumBGPAdvertisement and pool resources by comparing existing vs desired spec before calling Update
  • Add GenerationChangedPredicate to DynamicPrefix and pool watches so status-only changes don't trigger cross-controller reconciliation
  • Preserve LastTransitionTime on conditions when status hasn't actually transitioned (per Kubernetes convention)

Result

Operator CPU usage dropped from 176m to 2m (99% reduction).

Installation

Using Helm (recommended)

helm install dynamic-prefix-operator \
  oci://ghcr.io/jr42/dynamic-prefix-operator/helm/dynamic-prefix-operator \
  --version 0.0.2

Using kubectl

kubectl apply -f https://github.com/jr42/dynamic-prefix-operator/releases/download/v0.0.2/install.yaml

Docker Images

Multi-arch images (amd64, arm64):

ghcr.io/jr42/dynamic-prefix-operator:v0.0.2
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